| Year | Value | | 2021 | 9,321,575.836 | | 2020 | 8,304,771.044 | | 2019 | 26,211,258 | | 2018 | 24,660,386 | | 2017 | 20,821,044 | | 2016 | 19,744,932 | | 2015 | 18,882,898 | | 2014 | 17,026,643.219122 | | 2013 | 16,311,250 | | 2012 | 17,571,565.203215 | | 2011 | 16,407,784.957168 | | 2010 | 15,781,210 | | 2009 | 12,503,629 | | 2008 | 13,135,437 | | 2007 | 12,870,324 | | 2006 | 12,932,671 | | 2005 | 11,844,657 | | 2004 | 9,878,598 | | 2003 | 9,159,815 | | 2002 | 8,052,660 | | 2001 | 7,948,374 | | 2000 | 8,000,757 | | 1999 | 7,403,800 | | 1998 | 6,479,500 | | 1997 | 7,274,200 | | 1996 | 7,183,100 | | 1995 | 6,395,500 | | 1994 | 5,801,600 | | 1993 | 5,581,500 | | 1992 | 4,685,000 | | 1991 | 4,818,600 | | 1990 | 5,364,900 | | 1989 | 5,641,500 | | 1988 | 5,125,900 | | 1987 | 4,386,900 | | 1986 | 3,825,000 | | 1985 | 4,337,300 | | 1984 | 4,461,400 | | 1983 | 3,951,800 | | 1982 | 4,091,200 | | 1981 | 4,159,800 | | 1980 | 4,116,000 | | 1979 | 3,783,700 | | 1978 | 3,211,200 | | 1977 | 3,076,800 | | 1976 | 2,998,800 | | 1975 | 2,936,400 | | 1974 | 2,763,600 | | 1973 | 2,313,800 | | 1972 | 1,868,100 | | 1971 | 1,659,500 | | 1970 | 1,519,000 |
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